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EPA's Vessel General Permit and Small Vessel General

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Table 27. Estimated Receiving Water Concentrations Resulting from <strong>Vessel</strong> Discharge Pollutant Loadings Under River<br />

Mixing Conditions.<br />

Pre VGP <strong>and</strong> sVGP Receiving Post VGP <strong>and</strong> sVGP Receiving Percent Reduction<br />

Polutant<br />

Water<br />

Water<br />

Average Scenario Loading<br />

Class Analyte Units Average (range)<br />

Average (range)<br />

(worst-best case scenarios)<br />

Metals Selenium, Total μg/L 0.051 (0-0.203) 0.051 (0-0.203) no change<br />

Metals Zinc, Dissolved μg/L 0.00446 (0.0000496-0.00968) 0.00418 (0.0000439-0.00948) 6% (2%-11%)<br />

Nutrients Ammonia As Nitrogen<br />

(NH3-N)<br />

μg/L 0.0149 (0.000167-0.032) 0.014 (0.000167-0.0285) 6% (0%-11%)<br />

Nutrients Total Phosphorus μg/L 0.0225 (0.000271-0.0453) 0.00248 (0.0000242-0.00594) 89% (87%-91%)<br />

SVOC 2,4,6-Trichlorophenol μg/L 0.00000539 (0.0000000626-<br />

0.0000113)<br />

0.00000376 (0.0000000313-<br />

0.00000986)<br />

30% (13%-50%)<br />

SVOC Benzo (a)anthracene μg/L 0.000268 (0.00000164-0.0008) 0.000268 (0.00000164-0.0008) no change<br />

SVOC Benzo (a)pyrene μg/L 0.0002 (0.00000159-0.000536) 0.0002 (0.00000159-0.000536) no change<br />

SVOC Benzo (b)fluoranthene μg/L 0.000114 (0.00000139-0.000228) 0.000114 (0.00000139-0.000228) no change<br />

SVOC Benzo (k)fluoranthene μg/L 0.000126 (0.00000154-0.000252) 0.000126 (0.00000154-0.000252) no change<br />

SVOC Bis (2-ethylhexyl)<br />

phthalate<br />

μg/L 0.0000981 (0.00000118-<br />

0.000198)<br />

0.0000839 (0.000000979-<br />

0.000175)<br />

14% (12%-17%)<br />

SVOC Chrysene μg/L 0.000325 (0.00000164-0.00102) 0.000325 (0.00000164-0.00102) no change<br />

SVOC Ideno (1,2,3-cd)pyrene μg/L 0.000102 (0.00000124-0.000203) 0.000102 (0.00000124-0.000203) no change<br />

VOC Benzene μg/L 0.000579 (0.00000701-0.00117) 0.000538 (0.00000641-0.0011)

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